4.5 mL Conical Bottom Centrifuge Tubes — Polypropylene, Green, 250/Bag (214-2355-G30)
These 4.5 mL conical bottom tubes measure 12 × 75 mm and are molded from virgin-grade polypropylene (PP), making them well suited for clinical centrifugation, hematology differential work, and urinalysis sediment analysis. Supplied non-sterile in sealed 250/Bag packaging, they offer consistent lot-to-lot dimensional tolerances that ensure reliable seating in standard 12 mm centrifuge tube holders. The green color provides immediate visual identification in color-coded sample racks, reducing handling errors in high-throughput clinical environments.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 214-2355-G30 |
| Volume | 4.5 mL |
| Dimensions | 12 × 75 mm |
| Bottom Style | Conical |
| Material | Polypropylene (PP) |
| Color | Green |
| Sterility | Non-Sterile |
| Pack Size | 250/Bag |
| BPA / Phthalate Free | Yes |
| Country of Origin | USA |
Applications
- Clinical hematology differential — conical geometry concentrates the cellular pellet at the tube tip for clean aspiration with minimal disturbance
- Centrifuge pelleting in 12 mm rotor positions for serum, plasma, and whole-blood samples
- Toxicology sample preparation — conical bottom supports complete phase separation and pellet recovery
- Urinalysis sediment analysis — tight dimensional tolerances ensure consistent sediment concentration in the conical tip
- General clinical bench work requiring color-coded, rack-compatible 12 × 75 mm tubes
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers / saline | Excellent |
| Dilute acids | Excellent |
| Dilute bases | Excellent |
| Methanol | Good |
| Isopropanol | Good |
| Acetonitrile | Good |
| Aromatic / chlorinated solvents | Limited — not recommended for prolonged contact |
Quality & Procurement
Made in USA, these Caplugs® Evergreen tubes are produced at ISO-certified facilities from FDA-compliant virgin-grade polypropylene that is BPA-free and phthalate-free. Each bag carries a lot number and manufacturing date to support full traceability under CAP, CLIA, and ISO 15189 quality programs. LabSupplies.com is an authorized Caplugs® Evergreen dealer shipping from USA inventory, with tiered volume pricing available for clinical labs, hospitals, and research institutions placing recurring orders.
Frequently Asked Questions
Are these centrifuge tubes sterile?
No — part number 214-2355-G30 is supplied non-sterile in sealed 250/Bag packaging. For applications requiring a sterile article, a separately listed sterile format should be selected.
What centrifuge rotor positions do these tubes fit?
The 12 × 75 mm outer dimensions are compatible with standard 12 mm clinical centrifuge tube holders. Always confirm that your specific rotor or rack accepts the 12 mm diameter before use.
Why is the tube green?
Green is used as a color-coding convention to help staff quickly identify the correct tube type in multi-analyte sample racks. This reduces misidentification errors in high-throughput clinical workflows without requiring any retraining.
Can these tubes be used with serum, plasma, and urine samples?
Yes — polypropylene is chemically compatible with serum, plasma, urine, and standard aqueous clinical reagent matrices. The virgin-grade, BPA-free, phthalate-free resin is appropriate for direct contact with these sample types.